Pulling-over and like machine



C. M. BAGSHAW.

PULLING-OVER AND LIKE MACHINE.

APPLICATION FILED NOV, 1, I919.

Patented July 27, 1920.

2 SHEETS-SHEET 1.

C'. M. BAGSHAW.

PULLlNG-OVER AND LIKE MACHINE.

APPLICATION FILED NOV. 1, I919.

Patented July 27, 1920.

2 SHEETS-SHEET 2.

UNITED STATES rsur OFFICE.

CHARL S MARTIN BAGSHAW, or LEICESTER, 'ENGLAND, AssIe oR To f fi SHOE MACHINERY COMPANY LIMITED,. or LEICESTER: ENG AND, A doitrom- Tron OF GREAT BRITAIN.

PULLING-OVER AND LIKE MACH E;

Application filed November 1, 1919.

'ing. In such machines there is usually employed a single pincer mechanism for: gripping the upper at the toe extremityiwhile on eachside of the toe the upper is gripped by the twin pincer mechanism aforesaid.

Obviously in shoes of different sizes and shapes, the contour of the edge of the upper to be gripped by the twin pincerson either side of the toe will vary, this contour being determined more or less by the shape of the last. To enable the twin pincer mechanism to beset so that the gripping jaws of each of it's-pincer devices occupy a position suit- I able for engaging the edge of the upper, the

carrier or housing in which the pair of pincer devices is mounted has been arranged for rotary adjustment, which adjustment has moved the two devices relatively to the last without however, altering the position of one device relatively to the other in the carrier or housing.

Inorder that the twin pincers may have s a better opportunity of engaging and imparting a square pulling strain upon the upper, itis desirable that provisionshould be made whereby the angular relationshipbetween the gripping faces of the pincer do vices of each pair may be varied so that the grippers can conform more nearly to the contour of that part of the edge-of the upper which they are to take hold of and pull. It is also desirable that the pulling strain im parted by each twin pincer mechanism should be equally or approximately equally distributed between the individual devices composing said mechanism. j

It is-the object of the present invention to provide for a pulling-overor like machine of the type previously referred to, an improved form of twin pincer mechanism embodying the above mentioned desirable. features.

Specification of Letters Patent. i

Patent-ea July 27', 1920.

Serial No. 335,010; 7 I

The invention therefore consists of a pincer mechanism of the kind wherein two pincer devices are mounted rier or housing the distinguishing feature being that said devicesare capable of individual rotary adjustment withinsaid car rier or housing for the purpose of varying the angular relationship of the faces of the gripping jaws of said devices, and that for imparting the pulling strain the said pincer devices are operated from a common actu ating member, through the medium of a bal ancing or equalizing member.

In carrying the invention into effect, each pincer device of the pair is formed with a round shank or case which its both rotatably and slidably in a holein. the carrier or housing. The said'case is supported in its hole bya spring and the actuating rods of the two devices are connected to a cross bar I to the center of which is connected an a ctu ating member by pulled down. r

To enable the invention to be clearly understood a convenient form of the same is shown in the accompanying drawing by way of example.

In the drawing Figure l is a front elevation of a twin pincer arrangement according to this invention.

' Fig. 2 is a side elevation of the same.

Fig. 3 is a-plan of'the associated pincer mechanism. Y

Throughout the drawings like parts are designated by the same reference characters.

Referring to Figs. 1 and2 the twin pincer mechanism comprises a carrier'or housing 1 in which are mounted pincer cases 2 these being round in cross section and fitting both rotatably and slidably in rier; each case 2 being supported in its hole by a compression sprin'g a reduced or shank part 5' of the case. The pincer cases are furnished at the upper end: with a pair of pivoted gripping jaws G, 7 combined with which is an inner ;rod 8 adapted upon downward movement to effect closure ofthe jaws. The gripping jaws and their; actuating means are preferably of'the kind used in theprior mechanism described in United States Letters Patent No. 1293162; The inner rod of each pincer device of the pair terminates in a ball 9 and connecting the balls of the two rods so as to be movable upon which the cross bar is in a common carholes 3 in'thecar- 4 which surrounds V each, is a cross bar to the center of which is connected, preferablyby a ball 11, a rod 12 or other convenient form of actuating member by which the cross bar is pulled down so that in turn it rods 8 of the two pincerdeviees. The cross bar is made in halves fastened together by screws the meeting faces of the two parts being cupped to form sockets for the purpose of engaging the balls 9 and 11.

The carrier or housing 1 is rotatably'adjustable in its support 14; so that the two pincer devices can be positioned bodily to suit the curvature of the upper in addition to which each pincer device, beingrotatable in the carrier 1, can be turned to such a position relatively to its companion device as will bring the faces of its gripper jaws to an approximate horizontal angle to engage theedge of the upper squarely, or

in other words the gripper jaws 6,. can, by turning the pincer devices, be set or automatieally set themselves so that their gripping laces are disposed substantially in line with the particular. part of the edge of the upper they are to engage. understood by reference to Fig. 3 where in addition to. the pincer mechanisms and gripping jaws already referred to, the op- )osite incer cases 2 and their i ers 6 K are shown in association with the toe pincer mechanism 15. v

Upon downward movement of the actuating member .12 to impart the initial strain,

1 the inner rods 8 of the pincer devices close the gripping, jaws upon the; upper after whichthe pincer cases 2 move down in the carrier 1 against the pressure oftheir supporting springs 4. During this actionthe cross bar 10 accommodates itself to the resistance of the two pincer devices and al- Qlows, when necessary, greater movement of one than of the other so that the pulling strain upon the two parts of the upperen ga ged is equalized. L

The ball eonnect'on 9 between the inner rods 8 of the pincer devices and the ball connections. 11 betweenthe cross bar 10 and the actuating member 12, enables the rotary ad ustment otthe carrler to take place withoutdisturbing the operative connection of the parts.- The rotation of the pincer" cases in the carrier may be limited by suit key working "within a groove. The rotary ad ustment of able means such as a pin or the carrier or housing may be suitably re- I I stricted.

.The carrier or housing 1' also carries the tack driving wipers and other associated parts comprising the pincer mechanism. ith regard to the rotation, of the pincer cases 2, 2" in the carrier 1, this adjustment maybe'effected byhand or the said devices pulls upon the inner This will be best may be freely turnable. so that the jaws are positioned automatically during the stretching operation. "Means may be provided for fixing'the pincer devices against further rotation after they have been positioned.

What I claim then is '1. For a pulling-over machine, a pincer mechanism comprising two pincer devices, a carrier common to said devices, and capable of rotary adjustment, said devices being capable of individual rotary adjustment within said carrier for the purpose of varying the angular relationship of the gripping jaws of said devices, an actuating member common to the two pin'cerdevices, and a balancing member through which the pulling strain is transmitted from the actuating. member to the two pincer devices.

2. For a pulling-over machine, a pincer mechanism comprising two pincer devices,

a carrier common to said devices and capable of an actuating member pivotally connected to the cross bar at a point intermediate of the connections to the gripper closing rods.

3. For a pulling-over-machine, a pincerx mechanism comprising two pincer devices, a carrier common to said devices and capable of rotary adjustment, said devicesbeing each formed with a round case which its both rotatably and slidably in a hole in the carrier, a compression spring supporting each pincer device in the carrier, a grip per closing rod in each pincer device, a cross bar pivotally connected to each gripper closing rod, and an actuating member pivotally connected to the. cross bar at a .point intermediate of the connections to the gripper closing rods. a 4. For a --pull1ng-over machine, a pincer mechanism comprising, in combination, a

carrier capableofrotary adjustment, two. pincer devices each independentlymounted rotatably and. slidably in a hole in the said carrier, afcom pression spring supporting each pincer device, gripping jaws in each pincer device, a rod in each pincer device for closing said jaws, a cross bar, a ball and socket connection between each rod and the cross bar, an actuating member. anda ball and soeketcconnection between the'said member and the center of the cross bar.

In testimony whereof, I have signed my name tothis specification.

, CHARLES MARTIN BAGIsHAw, 

